In 1969 Kristian joined the British pop group The New Seekers after working his passage to the UK as a shipboard entertainer. He sang (sometimes on lead), played guitar, wrote, and produced with The New Seekers from their formation in 1969 until 2002 (with a break-up and re-formation 1974-76). The New Seekers were connected with the original 60s Seekers through Keith Potger, an original Seeker who was the brains behind the younger, poppier group. They were popular in the UK (14 Top 40 entries 1970-77), and they had three charting records in the USA including I'd Like to Teach The World To Sing (1971, #1 UK, #7 USA).
I'll Give You Love was written by British singer-songwriter Crispian St Peters (1939-2010) who produced the single while touring Australia. At this time St Peters was known for his two big hits, You Were On My Mind (1965, #2 UK, #36 USA, a cover of the We Five US hit version of the Ian & Sylvia song) and The Pied Piper (1966, #5 UK, #4 USA, a remake of the 1965 original by The Changin' Times). Both songs were also hits in Australia.
According to the biography at the Marty Kristian website it was Ken Pitt, manager of Crispian St Peters, who arranged for Marty to record a song that Crispian had written and also invited him to come to England where he promised to help with his career.
I can't find any evidence of Crispian St Peters having recorded this himself.
Miki Dallon - I'll Give You Love(Lionel Segal) USA 1965Single on RCA Victor, B-side of I Care About You. The Foundations - I'll Give You Love(Colin Young) UK 1971Single on MCA, B-side of Smokey Ground.